[X86] For Silvermont CPU use 16-bit division instead of 64-bit for small positive numbers

Differential Revision: http://reviews.llvm.org/D5938

llvm-svn: 222521
diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp
index 9d877c9..afa0173 100644
--- a/llvm/lib/Target/X86/X86Subtarget.cpp
+++ b/llvm/lib/Target/X86/X86Subtarget.cpp
@@ -267,7 +267,8 @@
   HasVectorUAMem = false;
   HasCmpxchg16b = false;
   UseLeaForSP = false;
-  HasSlowDivide = false;
+  HasSlowDivide32 = false;
+  HasSlowDivide64 = false;
   PadShortFunctions = false;
   CallRegIndirect = false;
   LEAUsesAG = false;